platform/platform-impl/src/com/intellij/ide/actions/SplitterActionBase.java

/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.ide.actions;

import com.intellij.openapi.actionSystem.*;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.project.DumbAware;
import com.intellij.openapi.fileEditor.ex.FileEditorManagerEx;

/**
 * @author yole
 */
public abstract class SplitterActionBase extends AnAction implements DumbAware {
  public void update(final AnActionEvent event) {
    final Project project = CommonDataKeys.PROJECT.getData(event.getDataContext());
    final Presentation presentation = event.getPresentation();
    boolean inContextMenu = ActionPlaces.isPopupPlace(event.getPlace());
    boolean enabled = project != null && isActionEnabled(project, inContextMenu);
    if (inContextMenu) {
      presentation.setVisible(enabled);
    }
    else {
      presentation.setEnabled(enabled);
    }
  }

  /**
   * This method determines whether the action is enabled for {@code project}
   * if {@code inContextMenu} is set to {@code false}.  Otherwise,
   * it determines whether the action is visible in the context menu.
   *
   * @param project       the specified project
   * @param inContextMenu whether the action is used in context menu
   * @return              {@code true} if the action is enabled,
   *                      {@code false} otherwise
   */
  protected boolean isActionEnabled(Project project, boolean inContextMenu) {
    final FileEditorManagerEx fileEditorManager = FileEditorManagerEx.getInstanceEx(project);
    return fileEditorManager.isInSplitter();
  }
}